Container forming mechanism



GELL- 1,873,254

CONTAINER FORMING MECHANISM Filed Nov. 10, 1930 3 Sheets-Sheet 1 J} p1 a z i I; g;

as s: Q N a "5a :2 g M HMHHHHHHHHHHHIHin'*' ATTORNEY I Aug. 23, 1932. E. c. ANGELL CONTAINER FORMING MECHANISM Filed Nov. 10. 1950 5' SheetsShee-t 2 EIZIDVEQTOR Z n96 BY W ATTORIINEY Aug 23, 1932. E. c. ANGELL CONTAINER FORMING MECHANISM Filed Nov. 10. 1930 3 Sheets-Sheet 3 lli INVENTOR L'. 6.0? all 1 ATTQRNEY Patented Aug. 23, 1932 IUNITEDIQESTATES PATIENT OFFICE EDWARD C. AKGELL, OF NEW YORK, 'Y.

CONTAINER FORMING MECHANISM Application filed November 10, 1930. Serial No. 494,505.

The object of the present invention is to facilitate the cutting of the disc, and the forming of the bent up flange of the disc, and to further facilitate the rolling of the disc flange and the body together, by the application of a suitable lubricant, particularly one having an inert nature, and which can be readily applied to. the disc, and will not in any wa tainer; an which further can be readily aplied by coating one of the faces of the web rom which the disc is out.

A further object of the invention is to provide in connection with mechanism for feeding the web intermittently into the mecha-- nism for cutting the disc that is flanged and forced into the container, mechanism for continuously feeding the web from the supply roll into and through a device that will apply melted parafline to one face of the web, and which latter mechanism is timed relative to the said intermittent feed of the web whereby a sufficient slack or loop will be provided for the said intermittent feed into the disc cutting mechanism.

In the accompanying drawings showing one embodiment of my invention,

Figure 1 is a vertical section through the machine.

Fig. 2 is a plan view partly in section of the feeding means.

Fig. 3 is a plan view of the disc forming means.

Fig. 4 is a section on the line 44 of Fig. 1.

Fig. 5 is a cross section on the line 5-5 of Fig. 3.

Fig. 6 is a broken section on the line 6-6 of Fig. 5.

affect the contents of the con- Fig. 7 shows the means for rolling the disc flange and the body margins together.

Heretofore in this art, it has been found desirable to a certain extent to apply water, in the form of a spray or moisture, to this disc, or to the disc flange, that-will somewhat assist in the operation, but which tends to reduce the strength of the stock or fibers; and which has the further objection that if the moisture is not dried out before the container is subjected to a bath of 'parafline, that is customary in this art, the Wet paper-board will not readily take or absorb the melted parafiine, and hence a good seal is not pro- .vided at the bottom joint.

I have discovered that this operation is greatly facilitated by applying parafline to the bottom disc, or to one face of the disc, before it is inserted in the body, -and preferably before the disc has been cut from the web. In other Words the web is brought over a roll that moves in a bath of melted paraffine, so that a coating of paralfine is applied to one face of the web. This is preferably done in the same machine that forms the flanged bottom and secures it in the body. This web is caused to engage a parafline treated roll and then passes directly into the punch that cuts the bottom disc, which, as well known in this art, forces the disc through a die by a plunger and bends up the flange.

As shown in the drawings on a suitable base 2 is mounted a standard 3 provided with a cylinder 4, see Fig.1. In this cylinder slides a piston 5'reciprocated by an arm 6 through an eccentric? on a driving shaft 8 rotatably mounted on the base 2. The standard 3 also carries a die plate 9 into which the cylinder 4 is forced, that will cut a disc from a web 10 that is fed down in front of the die plate 9. The piston 5 has a rod 11 slidable therein that carries a head 12 slidable in the large bore 13 in the end of the piston. This head enters the reduced bore of the die plate and has a reduced diameter smaller than this bore, so that it can engage the cut disc inside of its margins and force it through this reduced bore of the die plate to produce a flange on the disc. The rod 11 is actuated by a cam 14 in timed relation with the movement; of the piston, so that the piston is first advanced to cut the disc 59, and thereupon the head is advanced to engage the cut disc and force it into and through the bore 13 of the die plate. In this art the previously formed body 15 is supported in a carrier 16 on the machine, that may be intermittently advanced by a feed chain 17 operatlng in a bracket 18 on the base. The flanged disc will be advanced into the open end of the body by the head 12.

It is obvious that the web of paper from which the discs are cut must be fed intermittently between the die plate and the piston. As shown the web 10 is fed down by a feed roll 19 engaged by a spring-pressed roll 20. The roll 19 carries a inion 21 engaging a gear 22, the latter carrylng a ratchet wheel 23. A lever 24 has an arm 25 that carries a pawl 26 that engages the ratchet wheel 23, which will advance these wheels and roller intermittently as the arm is swung by a bar 27 that engages a cam 28 on the shaft 8. Mechanism of this character is at present in A The carrier 16 must be brought by the chain to properly register with the flanged disc forming means to receive the flanged .disc from the head 12. As shown in Figs. 1 and 6 the carrier is provided with an arm .47 projecting downwardly that contains a tapered bore 48. A plunger 49 in the standard 3 is advanced by an arm 50 connected with the piston 5. This plunger has a tapered plug 51 mounted in a bore and pressedoutwardly by spring 52. When the piston is first advanced the arm will cause this plug to enter the tapered bore 48 of the arm, and thereupon pass into a bore 53 in the bracket 18. This will serve to accurately position the carrier for receiving the flanged disc from the head 12. The plug having a resilient connection, will always set properly and take up for wear.

Means are further provided for applying a coating of parafline to this web before it reaches the said rolls 19, 20, and which means preferably serves to feed the web continuously in contact with a roll running in a bath of melted parafline; and this mechanism is so designed as to advance the web continuously at the proper speed to supply the web {for its intermittent feed into the disc forming means just described. A supporting standard 29 at the rear carries a box that contains melted parafline, heated by suitable means not shown. Into this box extends a roll 34, whose shaft projects through the casing and carries a gear 33, that engages a gear 32 on a roll 31 that is spring-pressed downward- 1y against the roll 34 by springs 35, 36 as shown in Fig. 4. The shaft for the upper roll 31 carries a sprocket 37, driven by a chain 38 over to a supporting plate 46 and is guided between the intermittent feed rolls 19 and 20.

It will be understood that the web is intermittently advanced by the rolls 19 and 20 ,fine coating. This will be on the outer side of the flange portion, and the parafiine will tend to lubricate the disc portion passing through the die plate as forced by the head.

The very marked advantages of this method are that the parafline will act to a certain extent as a lubricant in the punch and die that cuts the disc. Also the paraffin will facilitate the bending up of the flange and will lubricate the same as thedisc is forced through the flange bending die, where heretofore in this operation, the friction between the paper and the die tends to break the fibers at such location. The paraifine on the disc also. facilitates the rolling operation where the flange and the body margins are rolled into a bead, in the usual manner, as by chasing rolls. Another advantage lies in the circumstance that where paper or paper board is treated with hot parafline, this substance does notlose its heat, and so remains some what plastic, as the web'moves from the treated roll to the punch and die; and this also applies in the said bending and the rolling operations, because the paratfine is still somewhat plastic and operates as a lubricant.

The means for rolling the flanged disc and the bodyend portion together are shown in Fig. 7, where a frame 63 carries a shaft 60 on which are mounted a pair of chasing rollers 61, 62. The body 15 in the holder 1 after the flanged disc has been inserted, is engaged by these chasing rollersby advancing the shaft 60, and the bead is formed on the web from a supply roll and passing it through a device for applying melted paraffine to one face of the web, which latter means will furnish a loop in the web to advance the paraflined web as fast as required for feeding it intermittently into said cutting means as set forth.

2. The method of forming a paper container by forming a flanged disc and inserting it in one end of a tubular body, that consists in feeding a web of paper continuously into and through a device that applies melted parafline to one face of the web, thereupon eedin such'web intermittently into a device that Wlll cut a disc from the web and form a flange on the out disc and feed the flanged disc into the body, which first feeding mechanism will advance the web in proper timed relation to the intermittent feed to always rovide suflicient slack for the proper feeding of the web by the intermittent advancing means.

3. The method of forming a paper container by forming a flanged disc and securing it in one end of a. tubular body, that con sists in feeding a web of paper continuously into and through a device that applies melted parafline to one face of the web, thereupon at once feeding such web intermittently into a device that will cut a disc from the web and form a flange on the cut disc, and at once feeding the flanged disc into the body and rolling the disc edge and the body end portion together to form a bottom in the body.

4:. In a paper container machine, a holder for a tubular body, means for cuttlng a disc from a paper Web and at the same time forming it into a flanged cup and at once forcing the flanged cup into a body and thereupon rolling the flange and the body edge portion into a bead to secure a bottom in the body, and means for feeding the paper web from a supply roll and passing it through a bath of melted parafiine and at once passing the roll through said flanged disc forming means and the cup forthwith into the flange rolling means, whereby the disc will be rendered pliable and easily workable in both the said forming means and the said rolling means by the just applied melted parafline.

Signed at New York, N. Y., on August 19,

EDWARD G. ANGELL. 

